Toolholder for grinding purposes



Feb. 3, 1953 v. s. ROACH TOOLHOLDER FOR GRINDING PURPOSES Filed Jan. 23,1950 lll/Afm' IN V EN TOR.

VHB/12 S. Roach W2* ATTORNEY.

Patented Feb. 3, 1953` UNITED STATES vPATEIWI" TQFFICIE '2,627,147`El*o'innnit 'Fon GR'BING "iftiii'si's "vefnsfizeacn within, kan.A#rmi/lic"ation"January 23, lsrialivo.'1&02067 vkvk3"olainiis. (C1.isi-*2m This invention relates, te? leile ll'wl, "'holir t0. hold 'thetQQlfOr grinding. and Shleilng purposes.. `Irinlany insiennes the lathe@0,01 is' Vor becomesvery shQI f lTQm use and fromv grinding tokeepthertoglshgrp- .Y v

,The present msthnd. of; grinding .0r sharpening the tool is that themachinist will holdthetool, which `may not ybe over a q narter of anvineh long 01 even less., hetweenhisnngsrsnnd against apower drivenAgrinding .vl/11,961. t@ Shgpn the cuttingedge of the toolLor'e'ven 4tochange the shape of thel tool A to better ,adapt Nthe 4tool to the jobthe tool isto. da .f'lhg-dfgn1tyris that the tool being so .shnrtdt isldmglll' t0. holdA the vtool against the grinding Wheel.. 111th@ .Properposition to 'grindthetool nfihewvightor. desired place. Furthermore, infgjr ind ir rg the tool, it is necessary vto..Dartig1-1x .grind the, .w91and then-inspect the .tool.tqdstennnefwhether 01' not .the tooliis beingnronerlrgronndsnd then the grindingo, thetoolis resnrnedto complete the4job. Theptoolhaving onde been drenrioved from the grinding l vvhfe'eLitx diiricultubecause of` its small size tonreplaee 4themtool againsty'the grinding ,wheelf4 in its A,Qrginjal ,positionmtov eempletethqjobuof grinding.n `A still fiirther and serions digicnltv is. that,in hplflngts'uch a Smell tool against the.. grinding.. wheel 'the .i091wi11 `euicklv heat .and burn, the macninistsnngers and `newiu teAfnrcedtodrnp thgtool whereby he mees the position n; which1he"wasfn'olflirigf trie tool, and the positionyvilihaveto bere-established to proceed with the'g ri nding v This ofteneausesniisgrndingof the tooitvhich Willjha've to be correcte'andinvolvesfnrther or additional grinding and Wasting away of the tool.

Astill further diioulty fis. thatin holding seh a small tool against thegrinding Wheel the VWheel Wiireateh tnetooi and jerk itfrqmfthewmachinists hand whereupon the machinists vhand mightv be thrownagainst the `wh eel, or wedged between the Wheel and tool lrest orsupport of the grinder and badly injnre the"'machinists hand, even totheextent or losing some fingers.

V In View of all ofbthese` diiiiiculties and. dangers, `I have providedI ny VimprovedV tool* holder that is designed to receive and solidlyhold 'af small Vlathetool so that the toolrmay be easily and Aquicklyplaced win the" i091 helder and, @Genieten held .against the. grindingWheel .i9 tneproner .or desired position with. Complet@ Safety t the Inachinist andWithoutudangerof burning his .fingersv Ifthe,trouhleandfdsngers @n De" nftool homer, the maeiiinist'win" grind'the' tool with moreconfldence and iciai'emand lwith nre accuracy and iall 'this "in 'milch "less i time and v vith much less wrk. Thesey andother'bjects Will be more fullyI dsribed'as this'dseription nr0gress`es,Now referring tothe accompanying' drawings 'in whieh similar' merals'bf"reference designate Fig. 1 and looking inthe of 'th'e'airows. Fig. 5v isaside vievgr of one of the' tool'liolder `jaws and supporting barrel'-therefor.

Fig. 6 is a side view oi t l 1e clampingtool holder jaw that is acompanionA jaw to thevjaw shovvn inFig. 5. l

Fig. '7v is a detail longitudinal sectional "View through the gouter"end of the `tvvo tool holder jawsv and illustrating'hoyva tool "maybeheld therein for grinding purposes.

Fig. 8 is an enlarged detail p erspeetive' view oi' la shortl toolsuchas may be held in the "tool holder for tool grindingpnrposes.

In the --drawings the tool holder device is shown ashaving anintegrally" formed tool holder kjaw I5 andsupporting barrel I6 therefor.The supporting barrel I6 has'a bore I1 longitudinally therethrough, and'a tool holder javi/ I5 that is positioned'on one sideof the 'end of thebarrel I6 and is provided with a' ninety degree VV- "shapedlongitudinally disposed groove I8 therein that facesthe'longitudinal'center axis of the combination barrel-and'toolholderijaw I5-I6. The barrel IB 'is provided with a sloping end portionI9 thatslopes'f'rom'the-baseiof the tool holder jaw Iftowardthefoutencirole formation of the'barrel lpposi'te'thebaseof thetoolholder jaw I5, tlieslope' I9 forming; a V-shaped opening between theslope 4I 8 and 'i'.hetool' holder jaw I5.

The device is prOVdedyvithA asecond tool hold-- er jaw' 20 'that issubstantially the same length. as the t'o'ol holderjaw' I5. The toolIholder jaw 20 has one end bevelled"asiat4 2|. Immediately adjacent thesloping orj bevelled' portion 2 I `of f thetoolholder jaw 20 is'anoutwardly projecting 'foot 'portion 22 'that nas"- a bore zsffuirethrgh,

aezmev' the wall of which is threaded for purposes that will later bemade obvious.

The second tool holder jaw 20 has a longitudinally positioned ninetydegree V-shaped groove 24 in the face thereof that matches the groove I8in the tool holder jaw I5.

The tool holder jaw 20 may be placed against the tool holder jaw I withthe grooves I8 and 24 facing each other and then slipped longitudinallytoward the barrel I6 whereuponv the bevel 2I of the tool holder jaw willengage and be seated against the bevel I9 of the barrel I6, and the foot22 of the tool holder jaw 20 will be loosely received in the bore Il ofthe barrel I6 in such a manner that the tool holder jaw 20 will be movedtoward the tool holder jaw I5 as the tool holder jaw 20 is moved towardthe barrel I6, and will be permitted to move away from the tool holderjaw I5 as the tool holder jaw 20 is longitudinally moved away from thebarrel I6.

The device is provided with a handle and adjustment element B that ismade of a single piece of material and comprises the handle portion 25,a lesser diameter portion 26a and a still lesser diameter portion 26,and a still lesser diameter and threaded end portion 21 that isthreadedly receivable in the threaded bore 23 of the foot 22 of the toolholder vjaw 20, and the portion 26 is revolvably carried in the outerend of the bore Il and the portion 26a of the part B is revolvablycarried in the end portion of the bore Il. The portion 26 of the part Bis smaller in diameter than the bore Il of the barrel I6 to permit someside movement of the part 26 in the bore Il. The portion of the part Bhas a bore 28 therethrough, and the portions 26a, 26 and 21 have asmaller diameter bore 29 therethrough, the bores 28 and 29 being inaxial alignment with each other and being positioned about the centerlongitudinal axis of the part B. The outer end of the bore 28 isthreaded as at 38 for reasons that will later be made obvious.

The device is provided with an adjustable tool stationing element Chaving a head or handle portion 3|, a reduced diameter threaded portion32 and a still more reduced diameter shaft portion 33. The portion 32and 33 are slidably passable through the bores 28 and 29 of the part Band the threads 32 of the part C are receivable in the threads of thepart B.

The tool to be ground is a tool similar to, or such as shown in Figs. '7and 8. The tool may have various shapes but all the tools have a squareor rectangular butt such as indicated at S4, and these butts 34 are manytimes very short, as short as one-eighth to one quarter of an inch.

Now to use the tool holder, the handle portion B of the tool holder maybe turned to partially unscrew the threads 21 thereof from the threadsof the bore 23 in the foot 22 of the tool holder jaw 20, whereupon thetool holder jaw 20 may move outwardly along the tool holder jaw I5 andthe bevel 2| may slide sideways along the bevel I9 and allow the twotool holder jaws I5 and 20 to separate slightly and thereby increase thesize of the square opening formed at the end of the tool holder jaws I5and 28 by the two V-shaped grooves I8 and 24.

The opening I8-24 having been slightly enlarged, the butt 34 of the toolmay be slipped between the outer ends of the jaws I5 and 20 and projectlongitudinally therefrom. The tool having thus been positioned in thetool holder, the handle B may then be turned to screw the threads 21into the threads of the bore 23 whereupon the tool holder jaw 20 will bedrawn rearwardly and the bevel I9 acting on the bevel 2I will force thejaw 20 to move toward the jaw I5 and thereby bind and hold the toolbetween the two jaws I5 and 20.

The tool being held in the manner above described makes it possible togrind the tool with perfect safety and ease, and therefore achieve amuch more nearly perfect job of tool grinding and sharpening.

While the tool holder device as shown and described is probably thepreferred form of the device, it is to be understood that suchmodifications of the device may be employed as lie within the scope ofthe appended claims Without departing from the spirit and intention ofthe invention. Now having fully shown and described my invention what Iclaim is:

l. A tool holder device of the kind described; said tool holder devicecomprising the combination of a barrel having a tool holder jawintegrally formed thereon and extending longitudinally from one endthereof and being wholly positioned on one side of the center axis ofthe barrel, one half of the end of the barrel opposite the said toolholder jaw being bevelled rearwardly from the outside toward the centeraxis of the barrel, a second tool holder jaw, said second tool holderjaw being substantially the same length of, and being positionable overthe first said jaw, one end of the second said jaw having an internallythreaded sleeve integrally formed thereon that is positionedconcentrically about the center axis of the said barrel, one side ofsaid sleeve being bevelled and being engageable with the aforesaid bevelon said barrel, a rotatable adjustment element, said rotatableadjustment element being revolvably positioned within said barrel andhaving one end thereof threaded into the said jaw sleeve, and stop meanson said adjustment element and engaging the rear end of the barrel, anadjustable tool stop, said tool stop being threaded into the saidadjustment element and extending therethrough and also through the firstsaid adjustment element and between said jaws to engage the rear end ofa tool held between said jaws to hold the tool in longitudinallyadjusted position between the said jaws.

2. A tool holder device of the kind described; said tool holder devicecomprising in combination, a hollow barrel having a long tool holder jawintegrally formed on and projecting longitudinally from one end of thebarrel and being wholly positioned to one side of the centerlongitudinal axis of the barrel, said jaw having a tool seat therein andextending the entire length thereof and facing the center longitudinalaxis of the barrel, the nonjaw supporting half of the end of the barrelbeing bevelled inwardly and rearwardly toward the center axis of thebarrel, a second tool holder jaw of substantially the same length as thefirst said tool holder jaw, one end of the second said tool holder jawhaving an internally threaded sleeve element integrally formed thereonand the jaw end adjacent the sleeve being bevelled to match and litagainst the bevel on the barrel, said second tool holder jaw elementbeing opposingly positioned over the first said tool holder jaw with thebevel of the second tool holder jaw bearing against the bevel of thebarrel and the internally threaded sleeve being concentricallypositioned about the center axis of the barrel, the second said toolholder jaw having a tool seat formed therein that extends the fulllength of the jaw and complements the tool seat of the first said jaw, atool holder jaw adjustment element, said jaw adjustment element beingrevolvable and partially carried Within said barrel and having one endthereof threadedly received in the said jaw sleeve, and means on the jawadjusting element for stationing and holding the jaw adjustment elementconcentric in the barrel, and adjustable stop means carried by the jawadjustment element for adjusting the longitudinal position of a toolheld between the two tool holder jaws.

3. A tool holder device of the kind described; the combination andarrangement of the several parts of the device as defined in claim 2,said combination being further characterized by the said jaw adjustingelement having a large and a smaller bore therein and each bore beingaxially aligned with the other and being joined together substantiallymid-way between the ends of the jaw adjustment element and beingconcentric about the center longitudinal axis of the jaw adjustmentelement, said adjustable stop means for adjusting the longitudinalposition of a tool held between the tool holder jaws being a shaft thatis threaded into the larger of said bores for longitudinal adjustmentthereof, and means of the exposed end of the shaft bywhich the shaft maybe revolved for adjustment pur 6 poses, the inner end of said shafthaving a long pin-portion as an integral part thereof and extending inan aligned position therefrom and being extensible between andsubstantially to the outer end of said tool holder jaws and beingrevolvably carried as a journal in a bearing in the smaller of saidbores.

VERN S. ROACH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

